Finding the Fourth Proportional to 52,638.12, 72,606.66 and 31,401

Step by Step Solution

1. Step 1: Write the proportion equation
   52,638.12 : 72,606.66 = 31,401 : x
2. Step 2: Convert to fraction form
   52,638.12/72,606.66 = 31,401/x
3. Step 3: Cross multiply
   52,638.12x = 72,606.66 × 31,401
4. Step 4: Simplify right side
   52,638.12x = 2,279,921,730.66
5. Step 5: Solve for x
   x = 2,279,921,730.66/52,638.12
6. Step 6: Final answer
   x = 43,313.13